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La Vallée-du-Richelieu
Regional county municipality
Location in province of Quebec.
Coordinates: 45°34′N 73°12′W / 45.567°N 73.200°W / 45.567; -73.200
Country	Canada
Province	Quebec
Region	Montérégie
Effective	January 1, 1982
County seat	McMasterville
Government
• Type	Prefecture
• Prefect	Gilles Plante
Area
• Total	605.50 km (233.78 sq mi)
• Land	588.60 km (227.26 sq mi)
Population
• Total	124,420
• Density	211.4/km (548/sq mi)
• Change 2011-2016	6.5%
• Dwellings	49,971
Time zone	UTC−5 (EST)
• Summer (DST)	UTC−4 (EDT)
Area code(s)	450 and 579
Website	www.mrcvr.ca

La Vallée-du-Richelieu (French pronunciation: [la vale dy ʁiʃ(ə)ljø], The Valley of the Richelieu) is a regional county municipality in the Montérégie region in southwestern Quebec, Canada. Its seat is McMasterville.

It surrounds the Richelieu River as the river flows north from Lake Champlain in the United States to the Saint Lawrence River northeast of Montreal at Sorel-Tracy, Quebec. Dramatically different from the mountainous terrain to the south, the river valley is a vast plain that has been developed with extensive farmlands.

In the 21st century, the Richelieu River is very popular for both U.S. and Canadian recreational boaters, providing a connection that can bring boaters all the way from the outlet of the Saint Lawrence River to New York Harbor. A number of old fortifications exist dating back to the 17th century; they were built by the French in an effort to try to prevent the Iroquois from using the river as a way to attack the French settlers in the area. Fort Richelieu is at the mouth of the Richelieu River. Fort St. Louis (now Fort Chambly) at Chambly, Fort Sainte-Thérèse, and Fort Saint-Jean at Saint-Jean-sur-Richelieu, are on the way. Fort St. Anne Isle La Motte, Vermont in Lake Champlain is near the river's source. The region is informally known as la Vallée-des-Forts.

Subdivisions

There are 13 subdivisions within the RCM:

Former municipalities

• Saint-Bruno-de-Montarville (now part of the Urban agglomeration of Longueuil)

Demographics

Population

Language

Canada Census Mother Tongue - La Vallée-du-Richelieu Regional County Municipality, Quebec
Census		Total		French				English				French & English				Other
Year		Responses		Count	Trend	Pop %		Count	Trend	Pop %		Count	Trend	Pop %		Count	Trend	Pop %
2016		123,485		114,405	5.7%	92.6%		3,990	1.7%	3.2%		1105	19.5%	0.80%		3985	61.0%	2.14%
2011		115,690		108,230	9.5%	93.55%		4,060	0.6%	3.51%		925	55.5%	0.80%		2,475	4.4%	2.14%
2006		105,870		98,870	8.6%	93.39%		4,035	41.9%	3.81%		595	43.3%	0.56%		2,370	2.1%	2.24%
2001		118,635		108,215	5.8%	91.22%		6,950	2.7%	5.86%		1,050	8.8%	0.88%		2,420	3.2%	2.04%
1996		112,920		102,310	n/a	90.60%		7,145	n/a	6.33%		965	n/a	0.85%		2,500	n/a	2.21%

Transportation

Access Routes

Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border:

See also

• List of regional county municipalities and equivalent territories in Quebec

References

1. "Banque de noms de lieux du Québec: Reference number 141084". toponymie.gouv.qc.ca (in French). Commission de toponymie du Québec.
2. ^ "Répertoire des municipalités: Geographic code 570". www.mamh.gouv.qc.ca (in French). Ministère des Affaires municipales et de l'Habitation.
3. ^ "Census Profile, 2016 Census La Vallée-du-Richelieu, Municipalité régionale de comté [Census division], Quebec". Statistics Canada. Retrieved November 25, 2019.
4. "La Vallée-du-Richelieu Regional County Municipality (Code 2457) Census Profile". 2011 census. Government of Canada - Statistics Canada.
5. "2021 Community Profiles". 2021 Canadian census. Statistics Canada. February 4, 2022. Retrieved 2023-10-19.
6. "2016 Community Profiles". 2016 Canadian census. Statistics Canada. August 12, 2021. Retrieved 2019-11-25.
7. "2011 Community Profiles". 2011 Canadian census. Statistics Canada. March 21, 2019. Retrieved 2014-02-08.
8. "2006 Community Profiles". 2006 Canadian census. Statistics Canada. August 20, 2019.
9. "2001 Community Profiles". 2001 Canadian census. Statistics Canada. July 18, 2021.
10. ^ Statistics Canada: 1996, 2001, 2006, 2011 census

External links

• Fort Richelieu official site

v t e Adjacent Counties & Equivalent Territories
Pierre-De Saurel RCM Marguerite-D'Youville RCM Longueuil TE La Vallée-du-Richelieu RCM Les Maskoutains RCM Roussillon RCM Rouville RCM Le Haut-Richelieu RCM

v t e  Administrative divisions of Montérégie  (Region 16)
Regional county municipalities and equivalent territories	Acton Pierre-De Saurel Les Maskoutains Rouville Le Haut-Richelieu La Vallée-du-Richelieu Longueuil Marguerite-D'Youville Roussillon Les Jardins-de-Napierville Le Haut-Saint-Laurent Beauharnois-Salaberry Vaudreuil-Soulanges
Municipalities	Cowansville Granby Sorel-Tracy Saint-Hyacinthe Saint-Jean-sur-Richelieu Chambly Saint-Basile-le-Grand Mont-Saint-Hilaire Beloeil Brossard Saint-Lambert Boucherville Saint-Bruno-de-Montarville Longueuil Sainte-Julie Varennes La Prairie Candiac Sainte-Catherine Saint-Constant Mercier Châteauguay Beauharnois Salaberry-de-Valleyfield Pincourt Vaudreuil-Dorion Saint-Lazare
Administrative divisions of Quebec

• La Vallée-du-Richelieu Regional County Municipality
• Census divisions of Quebec